This advise was for the OP who has all primes and would benefit greatly of using two primes on two bodies. If your needs are different, you could start a thread if you'd like.If the OP shoots portraits using Live View, as I and others sometimes do, he may use Live View. therefore my post has relevance to the OP's intended use of the camera. The 5D does not offer this functionality. If you want to be defensive, perhaps you can start a separate thread on that.
Or you could read his original post. Streets, portraits, concerts, low-light. How is a tilt-shift lens at max ap f/3.5 going to be better than a 24 f/1.4? The 24 f/1.4L is cheaper and suits his needs more. A TS lens is for landscape photography and architectural shots, a specialty lens. For his wide variety of shots, the 24mm is hands down way better than the TS lens. So, we ARE going off what the OP needs.